Engineering & architectural masterpiece on 3.7 completely fenced & landscaped acres in sought-after Westridge. Award-winning architecture by Swatt Miers & top-end construction by Lencioni. A work of art in mahogany, glass, steel and poured-in-place concrete walls all above-ground. Bay views from Golden Gate Bridge to San Jose. Sleek interiors, to-the-ceiling walnut doors & baths with every wall entirely in Italian marble, onyx slab, or Italian hand-made glass tile. A world-class destination for luxurious living as well as corporate and/or professional events w/ 3 structures, one fully handicap-accessible & perfect large home office or fitness center + full apartment. 74-ft triple infinity edge pool and spa, outdoor kitchen, over 6,000 sf of patios & decks, level lawn, indoor spaces flow seamlessly outdoors without curbs. Sanctuaries with Zen tranquility abound. Midway between San Francisco and Silicon Valley. 1 mile to shops, restaurants and Hwy 280. Excellent Portola Valley schools.